Wonder to know whether people in China, Japan, USA, and/or any other countries/areas are awake or not?

Just check out the Are They Awake In website.

On the website homepage, you can find and click on the China link, then you can get the answer, as what you can see from the screenshot above.

If the answer is Yes, you will see an extra message like the following:

People are likely awake of just getting up in China (CN).

Besides, you can also see the date and time of the country even of different cities if any.

And if the answer is No, you will see an extra message like the following:

People are likely asleep or getting ready for bed in China (CN).

By the way, if there are multiple time zones of a Big Country like USA, you will probably get an answer as Maybe, with some explanation like the following:

United States of America (US) is a big country so it depends on which location you are talking about.

And below which, people in those cities marked in shady may be likely asleep, and in the others may be likely awake.